asp.net mvc qr code ASP.NET State Management in C#

Encoder QR Code 2d barcode in C# ASP.NET State Management

17 ASP.NET State Management
Print QR Code JIS X 0510 In Visual C#
Using Barcode creator for .NET Control to generate, create QR image in .NET framework applications.
www.OnBarcode.com
QR Code 2d Barcode Recognizer In C#
Using Barcode reader for .NET framework Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
You should always use Lock and UnLock together. However, if you omit the call to UnLock, the likelihood of incurring a deadlock is not high because the Microsoft .NET Framework automatically removes the lock when the request completes or times out, or when an unhandled error occurs. For this reason, if you handle the exception, consider using a finally block to clear the lock or expect to face some delay while ASP.NET clears the lock for you when the request ends.
Bar Code Maker In C#.NET
Using Barcode generation for .NET framework Control to generate, create barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Bar Code Decoder In C#.NET
Using Barcode reader for VS .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Tradeoffs of Application State
QR Code Drawer In Visual Studio .NET
Using Barcode encoder for ASP.NET Control to generate, create QR-Code image in ASP.NET applications.
www.OnBarcode.com
QR Code JIS X 0510 Printer In Visual Studio .NET
Using Barcode creator for VS .NET Control to generate, create QR-Code image in .NET framework applications.
www.OnBarcode.com
Instead of writing global data to the HttpApplicationState object, you can use public members within the global.asax file. Compared to entries in the HttpApplicationState collection, a global member is preferable because it is strongly typed and does not require a hashtable access to locate the value. On the other hand, a global variable is not synchronized per se and must be manually protected. You have to use language constructs to protect access to these members for example, the C# lock operator or, in Microsoft Visual Basic .NET, the SyncLock operator. Whatever form you choose for storing the global state of an application, some general considerations apply regarding the opportunity to store data globally. For one thing, global data storage results in permanent memory occupation. Unless explicitly removed by the code, any data stored in the application global state is removed only when the application shuts down. On one end, putting a few megabytes of data in the application s memory speeds up access; on the other hand, doing this occupies valuable memory for the entire duration of the application. For this reason, it is extremely important that you consider using the Cache object (which is discussed further in the next chapter) whenever you have a need for globally shared data. Unlike data stored with Application and global members, data stored in the ASP.NET Cache is subject to an automatic scavenging mechanism that ensures the data is removed when a too-high percentage of virtual memory is being consumed. In addition, the Cache object has a lot of other beneficial features that we ll explore in the next chapter. The bottom line is that the Cache object was introduced specifically to mitigate the problem of memory occupation and to replace the Application object. To put it down even clearer, today writing to the Application object is bad practice and is supported only to help with migration from classic ASP, where it was the common and easiest way of storing global data. In ASP.NET, Cache is the recommended solution for a single worker process and distributed caches (for example, Microsoft AppFabric Caching Services) if you re in a Web farm context.
QR Code Creation In VB.NET
Using Barcode generator for .NET framework Control to generate, create QR Code ISO/IEC18004 image in .NET applications.
www.OnBarcode.com
Denso QR Bar Code Maker In C#.NET
Using Barcode generation for .NET framework Control to generate, create QR Code image in .NET applications.
www.OnBarcode.com
Part IV
EAN-13 Creator In C#.NET
Using Barcode creator for Visual Studio .NET Control to generate, create GS1 - 13 image in VS .NET applications.
www.OnBarcode.com
Generating GTIN - 128 In Visual C#.NET
Using Barcode generator for .NET framework Control to generate, create GTIN - 128 image in VS .NET applications.
www.OnBarcode.com
Infrastructure of the Application
Matrix Barcode Maker In Visual C#.NET
Using Barcode creator for .NET Control to generate, create Matrix Barcode image in VS .NET applications.
www.OnBarcode.com
Generate OneCode In Visual C#
Using Barcode maker for Visual Studio .NET Control to generate, create 4-State Customer Barcode image in Visual Studio .NET applications.
www.OnBarcode.com
The Session s State
Drawing GS1-128 In VB.NET
Using Barcode creation for Visual Studio .NET Control to generate, create EAN 128 image in VS .NET applications.
www.OnBarcode.com
Bar Code Generation In None
Using Barcode creation for Online Control to generate, create barcode image in Online applications.
www.OnBarcode.com
The HttpSessionState class provides a dictionary-based model of storing and retrieving session-state values. Unlike HttpApplicationState, this class doesn t expose its contents to all users operating on the virtual directory at a given time. Only the requests that originate in the context of the same session that is, those generated across multiple page requests made by the same user can access the session state. The session state can be stored and published in a variety of ways, including in a Web farm or Web garden scenario. By default, though, the session state is held within the ASP.NET worker process. The ASP.NET implementation of session state provides some extremely handy facilities such as support for cookieless browsers, Web farms, and Web gardens and the capability of being hosted by external processes, including Microsoft SQL Server. In this way, ASP. NET session management can provide an unprecedented level of robustness and reliability. Developers can also create custom data stores for session state. For example, if you need the robustness that a database-oriented solution can guarantee but you work with Oracle databases, you need not install SQL Server as well. By writing a piece of additional code, you can support an Oracle session data store while using the same Session semantics and classes. The extensibility model for session state offers two options: customizing bits and pieces of the existing ASP.NET session state mechanism (for example, creating an Oracle session provider or a module controlling the generation of the ID), and replacing the standard session state HTTP module with a new one. The former option is easier to implement but provides a limited set of features you can customize. The latter option is more complicated to code but provides the greatest flexibility.
Drawing Matrix 2D Barcode In VB.NET
Using Barcode generation for Visual Studio .NET Control to generate, create Matrix Barcode image in .NET framework applications.
www.OnBarcode.com
Encoding PDF-417 2d Barcode In .NET
Using Barcode generation for ASP.NET Control to generate, create PDF-417 2d barcode image in ASP.NET applications.
www.OnBarcode.com
Recognizing PDF 417 In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Print GS1 - 13 In None
Using Barcode printer for Font Control to generate, create EAN / UCC - 13 image in Font applications.
www.OnBarcode.com
Printing UPC-A In Objective-C
Using Barcode maker for iPad Control to generate, create Universal Product Code version A image in iPad applications.
www.OnBarcode.com
Recognizing PDF 417 In Visual C#.NET
Using Barcode scanner for .NET framework Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.